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| Rosette Log Glue-up http://mowrystrings.luthiersforum.com/forum/viewtopic.php?f=10101&t=56092 |
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| Author: | Robbie_McD [ Tue Nov 28, 2023 8:15 pm ] |
| Post subject: | Rosette Log Glue-up |
I am working on a Romanillos style rosette for my current build. It is a pretty cool design, emulating some Moorish Arches in southern Spain. So far so good, bit of a brain teaser building the jig to make the log, but it is ready for glue-up. Having not done this bit before, looking for tips on glue-up. It fits so well in the clamping jigs I am tempted to soak in some thin CA glue. However I fear it might not soak in properly and fill any (very) tiny gaps. Or, take it apart and apply glue to each piece and fit it back into the clamping jigs. If so, I am thinking fish glue, vs Titebond, as it dries clear. Suggestions? Attachment: DSCN2267 (Phone).JPG
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| Author: | jfrench [ Wed Nov 29, 2023 9:33 am ] |
| Post subject: | Re: Rosette Log Glue-up |
I use the same method, wax paper the holes in the plywood, and then thin CA. I also clamp the kerf of the plywood. It works very well. |
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| Author: | Robbie_McD [ Wed Nov 29, 2023 11:35 am ] |
| Post subject: | Re: Rosette Log Glue-up |
Thanks Josh, glad to hear from someone who has done this before! Yes, the kerf in the plywood clamping jig is designed for clamps to get everything tight. Will wax paper the jigs and wick in some CA. |
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| Author: | Eric Reid [ Wed Nov 29, 2023 12:46 pm ] |
| Post subject: | Re: Rosette Log Glue-up |
I haven't done one of Romanillos' rosettes, but I watched the construction of one by a Paracho builder who had studied with Romanillos. His clamping caul was made by drilling down the seam of two clamped blocks--so two pieces the full length of the log, with a half-cylinder groove in each. He glued the staves of the arches around the center dowel with Titebond, holding the pieces with his fingers, before wrapping the assembly tightly with string. Then the string was removed, the excess glue wiped off, and the log clamped in the waxed mold. I watched him do the whole process of the complete rosette, starting with wood scraps, a hand plane, knife, and a drill press. It took him less than two hours start to finish, and the result was noticeably cleaner than the rosettes I see in real Romanillos guitars. |
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| Author: | Robbie_McD [ Thu Nov 30, 2023 8:52 am ] |
| Post subject: | Re: Rosette Log Glue-up |
Pretty cool process Eric, thanks! I am following the Ray Courtnall plan for the build. Hopefully the jig I conjured up for cutting the 15 degree arch wedges is accurate enough that the staves are lined up correctly. |
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| Author: | meddlingfool [ Thu Nov 30, 2023 1:42 pm ] |
| Post subject: | Re: Rosette Log Glue-up |
What are we seeing here? |
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| Author: | jfrench [ Sat Dec 02, 2023 9:52 am ] |
| Post subject: | Re: Rosette Log Glue-up |
meddlingfool wrote: What are we seeing here? That is one of the first steps in making the famous Romanillos rosette, specifically the arches. He details the process in his book, which is now unfortunately out of print. Here's are some pictures of my homage to José (I too was one of his students), which I am currently French polishing and may help to explain. 
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| Author: | Dave Rickard [ Sat Dec 02, 2023 10:56 am ] |
| Post subject: | Re: Rosette Log Glue-up |
Very nice. Thanks for sharing |
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| Author: | Pat Foster [ Sat Dec 02, 2023 12:14 pm ] |
| Post subject: | Re: Rosette Log Glue-up |
Exquisite! |
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| Author: | meddlingfool [ Sat Dec 02, 2023 2:22 pm ] |
| Post subject: | Re: Rosette Log Glue-up |
Wow! That is beautiful, but I can’t tie it in to the first jig shown… |
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| Author: | jfrench [ Sat Dec 02, 2023 3:54 pm ] |
| Post subject: | Re: Rosette Log Glue-up |
Thanks guys! Ed, the jig in Rob's original post is really just three pieces of plywood, with holes in them (and a kerf). The round thing connecting them is actually part of the rosette, the triangular pieces are glued together into a circle as seen in the third picture in my post. The holes in the plywood help align the triangular pieces. I hope that helps. |
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| Author: | meddlingfool [ Sat Dec 02, 2023 4:27 pm ] |
| Post subject: | Re: Rosette Log Glue-up |
Ah, I see. The jig is for the arches near the rosette outer edge… |
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| Author: | Robbie_McD [ Sun Dec 03, 2023 9:30 am ] |
| Post subject: | Re: Rosette Log Glue-up |
Hi Josh, thanks for the photos - looks great! Wicking in the CA worked perfectly, thanks for the guidance. Ed, the round log with the 12 wedges representing the arches gets squared up first before cutting up into the individual pieces. I am currently fitting all the pieces together - it is coming along, here are a few pictures: Attachment: DSCN2268 (Small).JPG Attachment: DSCN2269 (Small).JPG Attachment: DSCN2272 (Small).JPG Attachment: DSCN2273 (Small).JPG Attachment: DSCN2274 (Small).JPG
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| Author: | SteveSmith [ Sun Dec 03, 2023 10:22 am ] |
| Post subject: | Re: Rosette Log Glue-up |
Looking great! Steve |
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| Author: | jfrench [ Sun Dec 03, 2023 10:38 am ] |
| Post subject: | Re: Rosette Log Glue-up |
Great job! Please don't forget to share the final result when you're finished. |
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| Author: | meddlingfool [ Sun Dec 03, 2023 12:45 pm ] |
| Post subject: | Re: Rosette Log Glue-up |
That’s really cool! I have to put on my readers just to look at the pictures, lol…can’t imagine trying to actually do that… |
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| Author: | Robbie_McD [ Sun Dec 03, 2023 1:02 pm ] |
| Post subject: | Re: Rosette Log Glue-up |
Hahaa! Sometimes I think my optivisor is glued to my head... I have just finished spraying an OM, so have lots of time while the finish cures. For this rosette you have to have lots of time, and lots of patience. Good thing I am not doing this for a living.... It took a week of trial and error just to get the arch log correct.... 
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| Author: | Robbie_McD [ Mon Dec 11, 2023 7:26 pm ] |
| Post subject: | Re: Rosette Log Glue-up |
Hey Josh, Here is a shot of the finished rosette with just a wash coat of shellac. I am pretty pleased with the result. Thanks for your input. Cheers! Rob Attachment: PXL_20231212_001535020 (Phone).jpg
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| Author: | meddlingfool [ Mon Dec 11, 2023 7:54 pm ] |
| Post subject: | Re: Rosette Log Glue-up |
Bravo! |
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| Author: | bcombs510 [ Mon Dec 11, 2023 7:58 pm ] |
| Post subject: | Re: Rosette Log Glue-up |
Yes, that is terrific! Sent from my iPhone using Tapatalk Pro |
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| Author: | SteveSmith [ Mon Dec 11, 2023 8:47 pm ] |
| Post subject: | Re: Rosette Log Glue-up |
That rosette looks great! |
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| Author: | jfrench [ Mon Dec 11, 2023 9:21 pm ] |
| Post subject: | Re: Rosette Log Glue-up |
Well done!! |
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| Author: | sdsollod [ Mon Dec 11, 2023 9:37 pm ] |
| Post subject: | Re: Rosette Log Glue-up |
Fantastic! |
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| Author: | John A [ Tue Dec 12, 2023 11:35 am ] |
| Post subject: | Re: Rosette Log Glue-up |
Nice job on the rosette ! |
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